626745889 has 16 divisors (see below), whose sum is σ = 787562496. Its totient is φ = 484520400.

The previous prime is 626745887. The next prime is 626745901. The reversal of 626745889 is 988547626.

It is not a de Polignac number, because 626745889 - 2¹ = 626745887 is a prime.

It is not an unprimeable number, because it can be changed into a prime (626745881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22267 + ... + 41824.

It is an arithmetic number, because the mean of its divisors is an integer number (49222656).

Almost surely, 2^626745889 is an apocalyptic number.

It is an amenable number.

626745889 is a deficient number, since it is larger than the sum of its proper divisors (160816607).

626745889 is a wasteful number, since it uses less digits than its factorization.

626745889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64236.

The product of its digits is 5806080, while the sum is 55.

The square root of 626745889 is about 25034.8934289723. The cubic root of 626745889 is about 855.7833473777.

The spelling of 626745889 in words is "six hundred twenty-six million, seven hundred forty-five thousand, eight hundred eighty-nine".